8.59% is the change from 850 to 923
Calculation steps:
[( 923 - 850 ) ÷ 850] x 100 = 8.59%
Formula
Percentage change = [(923 - 850) / 850] x 100
Subtract the new number by the original number
923 - 850 = 73
73 ÷ 850 = 0.08588235294117647
0.08588235294117647 x 100 = 8.59%